Can't disable states of disabled nation in multistore

[cate.88]

Hi, 

i've a multistore composed by 3 store:

main store: italy (nation has states)

france store: only france enabled, without states

international store: many country enabled, without states

 

When a customer start the registration process on france or international store, no country is selected yet. So, the state field is shown and it shows italian states (but italy it's not enabled on this two stores, so i don't want these states appearing). If i choose a country, the state field correctly disappear.

How can i set the state field to always be disabled? 

Thanks